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| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|---|
| 2 | #ifndef __MMU_H |
| 3 | #define __MMU_H |
| 4 | |
| 5 | /* |
| 6 | * Privileged Space Mapping Buffer (PMB) definitions |
| 7 | */ |
| 8 | #define PMB_PASCR 0xff000070 |
| 9 | #define PMB_IRMCR 0xff000078 |
| 10 | |
| 11 | #define PASCR_SE 0x80000000 |
| 12 | |
| 13 | #define PMB_ADDR 0xf6100000 |
| 14 | #define PMB_DATA 0xf7100000 |
| 15 | |
| 16 | #define NR_PMB_ENTRIES 16 |
| 17 | |
| 18 | #define PMB_E_MASK 0x0000000f |
| 19 | #define PMB_E_SHIFT 8 |
| 20 | |
| 21 | #define PMB_PFN_MASK 0xff000000 |
| 22 | |
| 23 | #define PMB_SZ_16M 0x00000000 |
| 24 | #define PMB_SZ_64M 0x00000010 |
| 25 | #define PMB_SZ_128M 0x00000080 |
| 26 | #define PMB_SZ_512M 0x00000090 |
| 27 | #define PMB_SZ_MASK PMB_SZ_512M |
| 28 | #define PMB_C 0x00000008 |
| 29 | #define PMB_WT 0x00000001 |
| 30 | #define PMB_UB 0x00000200 |
| 31 | #define PMB_CACHE_MASK (PMB_C | PMB_WT | PMB_UB) |
| 32 | #define PMB_V 0x00000100 |
| 33 | |
| 34 | #define PMB_NO_ENTRY (-1) |
| 35 | |
| 36 | #ifndef __ASSEMBLY__ |
| 37 | #include <linux/errno.h> |
| 38 | #include <linux/threads.h> |
| 39 | #include <asm/page.h> |
| 40 | |
| 41 | /* Default "unsigned long" context */ |
| 42 | typedef unsigned long mm_context_id_t[NR_CPUS]; |
| 43 | |
| 44 | typedef struct { |
| 45 | #ifdef CONFIG_MMU |
| 46 | mm_context_id_t id; |
| 47 | void *vdso; |
| 48 | #else |
| 49 | unsigned long end_brk; |
| 50 | #endif |
| 51 | #ifdef CONFIG_BINFMT_ELF_FDPIC |
| 52 | unsigned long exec_fdpic_loadmap; |
| 53 | unsigned long interp_fdpic_loadmap; |
| 54 | #endif |
| 55 | } mm_context_t; |
| 56 | |
| 57 | #ifdef CONFIG_PMB |
| 58 | /* arch/sh/mm/pmb.c */ |
| 59 | bool __in_29bit_mode(void); |
| 60 | |
| 61 | void pmb_init(void); |
| 62 | int pmb_bolt_mapping(unsigned long virt, phys_addr_t phys, |
| 63 | unsigned long size, pgprot_t prot); |
| 64 | void __iomem *pmb_remap_caller(phys_addr_t phys, unsigned long size, |
| 65 | pgprot_t prot, void *caller); |
| 66 | int pmb_unmap(void __iomem *addr); |
| 67 | |
| 68 | #else |
| 69 | |
| 70 | static inline int |
| 71 | pmb_bolt_mapping(unsigned long virt, phys_addr_t phys, |
| 72 | unsigned long size, pgprot_t prot) |
| 73 | { |
| 74 | return -EINVAL; |
| 75 | } |
| 76 | |
| 77 | static inline void __iomem * |
| 78 | pmb_remap_caller(phys_addr_t phys, unsigned long size, |
| 79 | pgprot_t prot, void *caller) |
| 80 | { |
| 81 | return NULL; |
| 82 | } |
| 83 | |
| 84 | static inline int pmb_unmap(void __iomem *addr) |
| 85 | { |
| 86 | return -EINVAL; |
| 87 | } |
| 88 | |
| 89 | #define pmb_init(addr) do { } while (0) |
| 90 | |
| 91 | #ifdef CONFIG_29BIT |
| 92 | #define __in_29bit_mode() (1) |
| 93 | #else |
| 94 | #define __in_29bit_mode() (0) |
| 95 | #endif |
| 96 | |
| 97 | #endif /* CONFIG_PMB */ |
| 98 | |
| 99 | static inline void __iomem * |
| 100 | pmb_remap(phys_addr_t phys, unsigned long size, pgprot_t prot) |
| 101 | { |
| 102 | return pmb_remap_caller(phys, size, prot, __builtin_return_address(0)); |
| 103 | } |
| 104 | |
| 105 | #endif /* __ASSEMBLY__ */ |
| 106 | |
| 107 | #endif /* __MMU_H */ |
| 108 |
Warning: This file is not a C or C++ file. It does not have highlighting.